Inventor · disambiguated record
Robert G. Challman
Also filed as: CHALLMAN ROBERT · CHALLMAN ROBERT G
6 granted patents·2 pending applications·49 citations·filing 2007–2022
81Inventor score
Top patents by PatentIndex Score
8 records- 0195US7488130B2Seal assembly for retractable instrumentSANFORD LP·Filed 2007·Granted Feb 10, 2009·23 cites·20 claims
- 0290US11564549B1Multidirectional dusting toolFREUDENBERG CARL KG·Filed 2021·Granted Jan 31, 2023·2 cites·24 claims
- 0385US7775734B2Seal assembly for retractable instrumentSANFORD LP·Filed 2009·Granted Aug 17, 2010·8 cites·20 claims
- 0484US8393814B2Retractable instrument having a two stage protraction/retraction sequenceCHALLMAN ROBERT G·Filed 2009·Granted Mar 12, 2013·9 cites·15 claims
- 0582US9050850B2Micro motion poppet valve assembly for delivery of ink with large pigment particles to a writing nib and writing instrument comprising sameGILLUM CHRISTOPH·Filed 2011·Granted Jun 9, 2015·7 cites·20 claims
- 0661US2023104177A1Cleaning articleFREUDENBERG CARL KG·Filed 2022·Application pending·0 cites
- 0754US8568047B2Retractable instrument having a two stage protraction/retraction sequenceCHALLMAN ROBERT G·Filed 2012·Granted Oct 29, 2013·0 cites·20 claims
- 0848US2014338931A1Liquid Wet Chemical Fire Extinguishing SprayBRK BRANDS INC·Filed 2014·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Robert G. Challman files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →